JPH11126A - Production of silk-strained bean curd using bittern only as coagulant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing silk-strained bean curd able to add a bittern in such amounts as to be necessary and sufficient for coagulating soybean milk without cooling and/or heating it, and obtainable a bean curd tastier than conventional ones, hard to crumble and rich in elasticity. SOLUTION: This method comprises as follows: soybean milk for the aimed silk-strained bean curd at high temperatures prepared by separating bean curd refuse from mashed soybean soup is cast into a coagulating box under agitation; at the same time, a coagulant solution with bittern alone dissolved therein is added to the soybean milk in the box, and granular solid bittern is also added to the box during the time period from the beginning of soybean milk casting to its completion; because only the coagulant solution is insufficient for an adequate amount of bittern to be added to the soybean milk, the bittern in the form of solid granules is added; thus, the objective tasty silk-strained bean curd hard to crumble and rich in elasticity which have not been experienced in conventional silk-strained bean curd can be afforded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for producing silken tofu using only bitter as a coagulant.

[0002]

2. Description of the Related Art Tofu conventionally manufactured is roughly classified into cotton tofu and silky tofu. Cotton tofu is manufactured by scooping soy milk solidified in a yose tub with a scoop, laying cotton inside, transferring it to a mold box with holes so that hot water flows out, and dehydrating press, It is a tofu with a textured surface, an uneven cross section, and a rough texture.

[0003] Silken tofu is obtained by solidifying a considerably thick soymilk in a gel form so as to bring the whole to the agar directly, and is put in a coagulation container without perforations and solidified with a coagulant without dehydration. Silken tofu has a smoother appearance and texture than cotton tofu, and its cross section is as detailed as egg tofu.

That is, in the case of silky tofu, the amount of water is limited to about 5 times the amount of the raw soybean when the go is boiled. If the amount is five times that of the raw soybean, the Brix sugar content is about 12.5%.

[0005] When the temperature of soymilk reached about 75 ° C, silky tofu was produced using calcium sulfate or glucono delta lactone as a slow-acting coagulant, but production using only bitter was impossible at all. . It is common knowledge in the industry that if tofu is produced using bitterness, a coagulant containing magnesium chloride as a main component, it will become the most delicious tofu.
In this case, cotton tofu was produced, but silky tofu alone was not.

[0006] As described above, in the conventional method for producing silken tofu, if quick-acting bitter is used as a coagulant, the reaction is too early due to the thick soymilk, so that the soymilk cannot be coagulated well. However, calcium sulfate suitable for coagulating the whole soymilk into a gel is used.

[0007] The coagulant glucono delta lactone is
Compared with the conventional coagulant, it is very suitable for the production of silken tofu, is easily soluble in water, decomposes into gluconic acid by heating, and has the effect of coagulating soy protein in soymilk. Even at high temperatures of ~ 90 ° C, the reaction is slow, so the properties of the resulting tofu are smooth,
Good skin can be obtained.

However, conventionally, tofu using bitter (magnesium chloride) as a coagulant is considered to be delicious,
Tofu coagulated with calcium sulfate is said to be inferior in taste. Glucono-delta-lactone has the disadvantage that it is nutritionally free of calcium and that if used in large amounts, the tofu becomes sour and unpalatable.

[0009] Even if bitter is used to produce silken tofu, bitterness has a strong coagulating power, and silky tofu has a much higher concentration of soymilk than that of cotton tofu. Air bubbles did not escape into the air and remained in the silken tofu, making it impossible to market them.

Therefore, in order to use bitter as a coagulant,
Once the soy milk is cooled to 25 ° C or less, bitter is mixed with it, and then filled into a plastic container of one size, that is, a one-pack size, and the container is closed and heated with steam to remove the soy milk. A method of solidifying is used. This is referred to as filled tofu in the industry, and can produce only one-pack size tofu, which is disadvantageous in that the productivity is poor, it is very troublesome, and the equipment cost increases.

In order to solve the problems of the method for producing silken tofu using bitter as a coagulant, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 191762, an invention of a method for producing a new silk tofu using bitter as a coagulant has been disclosed. In the present invention, a step of cooling the boiled soymilk for silken tofu to a medium temperature, and mixing a coagulant containing bitter as a main component while injecting the soymilk into a coagulation box, and half-yose like a kuzuyu.
And a second coagulation step of heating the soymilk, which has been subjected to the first coagulation step, in the coagulation box in hot water to completely coagulate it.

[0012]

However, in the method for producing silken tofu of the present invention, high-speed soymilk separated from okara from boiled koji juice is first used at 25 ° C. in order to use fast-acting bittern as a coagulant. It is necessary to cool below to slow down the coagulation reaction. In addition, a two-stage coagulation step is required to control the coagulation reaction. That is, the soymilk coagulation step is a first coagulation step in which a coagulant mainly composed of bitter is mixed while the cooled soymilk is poured into a coagulation box, and a half-yose in a kuzuyu-shape is formed. Is heated in hot water while being kept in the coagulation box to completely coagulate.
Solidification process.

As described above, in the method for producing tofu of the present invention, the steps are complicated, and since the soymilk is cooled or heated until the tofu is completed, the protein contained in the soymilk is denatured. The finished tofu is bad. In addition, when adding bitter as a coagulant as a solution, the amount of bitter is limited, even if the coagulant in the coagulant solution is only bitter, if a certain amount or more of bitter is added,
Due to excessive reaction with soy milk, the skin of the finished tofu becomes rough and the fineness of silky tofu is lost. for that reason,
It is not possible to add a necessary and sufficient amount of bitter to coagulate soymilk, and it is recommended to mix to some extent one or two coagulants such as glucono-delta-lactone or calcium sulfate in addition to bitter.

The present invention has been made in order to solve the above-mentioned problems of the method for producing silken tofu using only bitter as a coagulant, and is capable of cooling soymilk without heating or cooling the soymilk. It is an object of the present invention to provide a method for producing a silky tofu which can be added to a required amount and a sufficient amount of bitter to coagulate, is more delicious than conventional silken tofu, is hard to break and has a high elasticity. .

[0015]

Means for Solving the Problems In view of the fact that there is a certain limit in adding bitterness as a solution to soymilk as a solution, the inventors have intensively studied other auxiliary adding means. Was. As a result, it is necessary to mix the bitter solution into the soymilk injection flow and add granular solid bitter to the soymilk injected into the soymilk coagulation box from the start of the soymilk injection to the completion of the injection. The present inventors have found that sufficient bitterness can be added as a coagulant and completed the present invention.

The method for producing silken tofu using only bitter as the coagulant according to claim 1 of the present invention is characterized in that the soymilk for silken tofu in a high-temperature state separated from boiled okara is poured into a soymilk coagulation box while stirring. At the same time while adding a coagulant solution in which only bitter is dissolved in the soy milk injection flow, to the soy milk injected into the soy milk coagulation box from the start of injection of the soy milk to the completion of the injection into the soy milk coagulation box The gist is to add granular solid bittern.

According to a second aspect of the present invention, there is provided a method for producing silken tofu using only bitter as a coagulant, wherein the amount of bitter in the coagulant solution is 50% with respect to the total amount of the bitter.固体 60%, and the solid bittern is 40〜5%.
The gist should be 0%.

In the method of the present invention, a method of adding a coagulant solution in which only bitter is dissolved into the soymilk injection flow while stirring the soymilk while injecting it into the soymilk coagulation box is described in, for example, Utility Model Registration Publication No. 2511967. It is advisable to use an apparatus for producing silken tofu.

There is no particular limitation on the method of adding granular solid bittern to the soymilk injected into the soymilk coagulation box from the start of the injection of the soymilk to the soymilk coagulation box until the injection is completed.
For example, half the amount of solid bitter to be added prior to injecting the soymilk into the coagulation box may be added, and the other half may be added when the infusion of the soymilk is completed. The addition may be started, and the addition may be completed by the time the infusion of soymilk ends.

In the present invention, the ratio of bitter in the coagulant solution to 50 to 60% of the total amount of bittern is 5%.
If the amount is less than 0%, the amount of addition is insufficient, and elastic silky tofu cannot be obtained. If it exceeds 60%, the limit of adding bitter as a solution is exceeded, so that the skin of the tofu becomes rough and the silky tofu becomes This is because smoothness is lost.

When only the required amount of bitter aqueous solution is injected into the soymilk injection flow, since the aqueous solution has a rapid coagulation reaction, the solidification is complete but the air bubbles are not completely removed, so that the coagulation reaction of the soymilk is completed and there is no smoothness. You can only make rough tofu. However, when about 60% of the required amount of the bitter aqueous solution is injected, the hardness is not obtained by this alone, but the bubbles are completely removed, and the tofu becomes smooth. Therefore, in the present invention, when the required amount of the insufficient amount of 40-50% is added to the soymilk poured into the soymilk coagulation box at the same time as the solidified bitterness, the coagulation reaction occurs at the end of the stirring. In addition, silky tofu with sufficient air bubbles and firmness can be produced. In this way, by using bitter as a coagulant in combination with an aqueous solution and a solid, a silky tofu with elasticity, luster, and firmness using only bitter can be used. It became possible for the first time in Japan.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of an apparatus for producing silken tofu used in the method of the present invention. The base end 10 a of the soymilk supply pipe 10 is connected to the bottom surface of the soymilk tank 14 via a soymilk supply pump 12. The soymilk supply pipe 10 following the base end 10a is a rising section 10b, and further beyond the extension section 10c and a discharge section 10d.

The discharge part 10d of the soymilk supply pipe 10 is vertically mounted on a carriage 36 of a soymilk stirring device 32, which will be described later. The discharge section 10d and the rising section 10b are connected by an expansion and contraction section 10c, and the expansion and contraction section 10c expands and contracts as the discharge section 10d moves.

Check valve 1 is provided at rising portion 10b.
When the soymilk supply pump 12 is stopped, the soymilk in the soymilk supply pipe 10 is prevented from flowing backward. An opening / closing valve 18 is attached to the upper part of the discharge section 10d. The opening / closing valve 18 is opened when the soymilk supply pump 12 starts in conjunction with the soymilk supply pump 12, and closed when the soymilk supply pump 12 stops.

The coagulant tank 20 is connected to a coagulant circulation pipe 24 to which a circulation pump 22 is attached. The coagulant suspended in water constantly circulates in the coagulant circulation pipe 24. I have. In the method of the present invention, since a solution in which bittern is dissolved is used, there is no need to circulate a coagulant solution.

The base end of the coagulant injection pipe 26 is connected to the coagulant circulation pipe 24 via a flow control valve 28 and an on-off valve 30, and the tip is connected to the upper end of the discharge section 10 of the soymilk supply pipe 10. It is connected. The distal end of the coagulant injection pipe 26 is freely expandable and contractable according to the movement of the discharge section 10d of the soymilk supply pipe 10.

The on-off valve 30 attached to the coagulant injection pipe 26 is linked to the soymilk supply pump 12, so that the on-off valve 30 is opened when the soymilk supply pump 12 rotates, and closed when it stops. Is done.

The soymilk stirring device 32 includes a carriage 36 that moves on a rail 34 fixed horizontally, a reciprocating cylinder 38 that reciprocates the carriage 36, and a lifting cylinder 42 that is fixed to the carriage 36 and moves up and down the stirring plate 40. Consists of The discharge section 10d of the soymilk supply pipe 10 is fixed to the carriage 36, and the tip thereof is opened directly above the soymilk coagulation box 44.

The soy milk stirring plate 40 is composed of a socket 48 having a cylindrical body having a size that can be loosely fitted to the tip of the soy milk supply pipe 10, and blades 50 attached to both sides of the socket 48. It is loosely fitted to the section and is moved up and down by an elevating cylinder 42 fixed to the carriage 36. The carriage 36 reciprocates on the rail 34 by a reciprocating cylinder 38.

The operation of the apparatus of this embodiment will be described.
Initially, the on-off valves 18 and 30 are in a closed state, and the agitating plate 40 is raised by the lifting cylinder 42. When the soymilk coagulation box 44 is set at a fixed position located immediately below the discharge section 10d of the soymilk supply pipe 10, the elevating cylinder 42 is operated and the stirring plate 40 is lowered into the soymilk coagulation box 44.

Next, when the soymilk supply pump 12 is operated,
The on-off valves 18 and 30 are opened in conjunction therewith, soy milk is supplied from the soy milk tank 14 to the soy milk supply pipe 10. On the other hand, the coagulant in the coagulant tank 20 is circulated in the coagulant circulation pipe 24 by the circulation pump 22, and the base end of the coagulant injection pipe 26 is connected to the flow control valve 28. The coagulant adjusted to an appropriate amount by the flow control valve 28 by opening the on-off valve 30 flows into the coagulant injection pipe 26.

When the coagulant flows into the coagulant injection tube 26,
The tip of the coagulant injection pipe 26 is connected to the discharge section 10 of the soymilk supply pipe 10.
d, an appropriate amount of coagulant is continuously injected into the soymilk in the discharge unit 10d. This allows the coagulant to be quickly mixed with the soymilk before the coagulation of the soymilk starts, so that the soymilk 46 mixed with the coagulant is injected into the soymilk coagulation box 44 before the coagulation reaction of the soymilk starts. Can be. Further, by injecting the soy milk 46, the stirring plate 40 is immersed in the soy milk 46.

When a certain amount of soy milk 46 is supplied to the soy milk coagulation box 44, the soy milk supply pump 12 is stopped, and the supply of soy milk from the soy milk supply pipe 10 is stopped. At this time, the check valve 16 prevents backflow of the soymilk remaining in the soymilk supply pipe 10. When the operation of the soymilk supply pump 12 is stopped, the on-off valves 18 and 3
Since 0 is closed, the injection of the coagulant from the coagulation injection tube 26 is stopped at the same time as the supply of the soymilk is stopped.

When the injection of the soymilk 46 into the soymilk coagulation box 44 is started, the reciprocating cylinder 38 is operated without a break.
The reciprocating cylinder 38 moves the carriage 36 left and right on the rail 34, so that the stirring plate 40 attached to the tip of the soymilk coagulation tube 10 moves right and left in the soymilk coagulation box 44 accordingly. The soymilk 46 injected into 44 is agitated. When the stirring of the soymilk 46 is completed, the agitating plate 42 is pulled up from the soymilk 46 by the lifting cylinder 42.
Coagulation of the soy milk 46 in the soy milk coagulation box 44 starts, and the silken tofu is completed.

An example of using the apparatus of this embodiment to produce silken tofu using only bitter as a coagulant will be described. The soymilk tank 14 is filled with soymilk (about 13% on a Brix sugar meter) for silk tofu at 75 ° C., and the coagulant tank 2
At 0, the mixture was filled with a coagulant solution in which only bitter was dissolved as a coagulant, and the flow control valve was adjusted so that the amount of bitter was 60% of the total amount added by one injection of soymilk.

The soymilk supply pump 12 is operated, and the on-off valve 18
And 30 are opened, soy milk 46 mixed with a coagulant is started to be injected into the soy milk coagulation box 44 from the tip of the discharge part 10d of the soy milk supply pipe 10, and the granular solid bittern is reduced to 40% of the total added amount. Soy milk 46 injected into the soy milk coagulation box 44
Was added. The addition of the solid bitter was completed from the start of the infusion of the soymilk into the soymilk coagulation box until it was completed. In addition, soy milk 4
Immediately after the injection of No. 6 into the soymilk coagulation box 44 was started, the soymilk stirring device 32 was operated, and the soymilk 46 was stirred by the stirring plate 44.

After the stirring of the soy milk 46 is completed, the stirring plate 42 is pulled out of the soy milk 46 and left as it is.
The coagulation of the soymilk 46 in the soymilk coagulation box 44 started, and the silky tofu was completed. The finished silken tofu has a very smooth surface and is hard to break, and is durable.It is rich in elasticity and taste that is not found in conventional silken tofu. Cut surface.

[0038]

As described in detail above, the method for producing silken tofu using only bitter as a coagulant according to the present invention is characterized in that, while soymilk for high-temperature silken tofu is poured into a soymilk coagulation box while stirring, A coagulant solution in which only bitter is dissolved is added to the soymilk injection flow, and the soymilk injected into the soymilk coagulation box from the start of the injection of the soymilk to the completion of the injection into the soymilk coagulation box is granulated. It is to add a solid bitter in the form, and the coagulant solution alone is insufficient as a sufficient amount, so by adding the insufficient bitter as a granular solid bitter, it was poured into a soy milk coagulation box It is possible to add necessary and sufficient bitter to soy milk, and it is possible to produce a silky tofu that is rich in elasticity, hard to break, and delicious, unlike the conventional silky tofu.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an apparatus for producing silken tofu used in carrying out the method of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 soy milk supply pipe 12 soy milk supply pump 14 soy milk tank 18, 30 open / close valve 20 coagulant tank 22 circulating pump 24 coagulant circulating pipe 26 coagulant injection pipe 28 flow rate control valve 32 soy milk stirrer 34 rail 36 cart 38 reciprocating cylinder 40 stirring Plate 42 Lifting cylinder 44 Soy milk coagulation box 46 Soy milk

Claims (2)

[Claims] Claims 1. A high-temperature soybean milk for tofu separated from boiled okara is stirred while being poured into a soymilk coagulation box, and a coagulant solution in which only bitter bit is dissolved is added to the soymilk injection stream. Using only bitter as a coagulant, wherein granular solid bitter is added to the soymilk injected into the soymilk coagulation box from the start of the injection of the soymilk to the completion of the injection into the soymilk coagulation box. A method of producing silken tofu. 2. The method according to claim 1, wherein the bitter in the coagulant solution is 50 to 60% and the solid bitter is 40 to 50% based on the total amount of the bitter. A method for producing silken tofu using only bitter as a coagulant.